Proceedings of nanoGe September Meeting 2017 (NFM17)
Publication date: 20th June 2016
Abstract
Tungsten trioxide (WO3) is a promising material for photo-electrochemical (PEC) water splitting because of its good photoelectron mobility (~12 cm2V-1s-1 at RT), suitable band-gap (2.6-2.8 eV) and good chemical stability [1-3]. The microstructure, chemical states and internal defects play a sensitive in the PEC properties of WO3 [1,3]. In this study, WO3 thin films were grown on FTO-glass substrates by reactive radio frequency (RF) sputtering and by plasma enhanced atomic layer deposition (ALD), respectively. As-deposited films were annealed in a tubular furnace in different atmosphere with different ratios of nitrogen (N2) and oxygen (O2) as well as air. The structural properties were evaluated by XRD, XPS and SEM and photo-electrochemical properties were studied with cyclic voltammetry and electrochemical impedance spectroscopy in 0.5 M H2SO4 electrolyte. The results show that significantly higher photocurrent was obtained for ALD WO3 thin films during PEC water splitting than RF sputtered WO3 films. Moreover, the ALD WO3 films annealed in N2 revealed the best performance of PEC water splitting, while there is no significant difference in the structural and photo-electrochemical properties for RF sputtered WO3 films annealed in different atmosphere. In our presentation, we will relate the structural and chemical properties of the different WO3 thin films with the PEC properties and from this will conclude about how to process and design high performing electrodes for water splitting.
Reference
[1] Mi, Zhanaidarova, Brunschwig, Gray, Lewis, Energy Environ. Sci., 2012, 5, 5694–5700.
[2] Zhu, Chong, Chan, ChemSusChem, 2014, 7, 2974 – 2997.
[3] Wang, Ling, Wang, Yang, Wang, Zhang, Li, Energy Environ. Sci., 2012, 5, 6180–6187.
nanoGe is a prestigious brand of successful science conferences that are developed along the year in different areas of the world since 2009. Our worldwide conferences cover cutting-edge materials topics like perovskite solar cells, photovoltaics, optoelectronics, solar fuel conversion, surface science, catalysis and two-dimensional materials, among many others.
Previously nanoGe Spring Meeting (NSM) and nanoGe Fall Meeting (NFM), MATSUS is a multiple symposia conference focused on a broad set of topics of advanced materials preparation, their fundamental properties, and their applications, in fields such as renewable energy, photovoltaics, lighting, semiconductor quantum dots, 2-D materials synthesis, charge carriers dynamics, microscopy and spectroscopy semiconductors fundamentals, etc.
International Conference on Hybrid and Organic Photovoltaics
International Conference on Hybrid and Organic Photovoltaics (HOPV) is celebrated yearly in May. The main topics are the development, function and modeling of materials and devices for hybrid and organic solar cells. The field is now dominated by perovskite solar cells but also other hybrid technologies, as organic solar cells, quantum dot solar cells, and dye-sensitized solar cells and their integration into devices for photoelectrochemical solar fuel production.
Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics
The main topics of the Asia-Pacific International Conference on Perovskite, Organic Photovoltaics and Optoelectronics (IPEROP) are discussed every year in Asia-Pacific for gathering the recent advances in the fields of material preparation, modeling and fabrication of perovskite and hybrid and organic materials. Photovoltaic devices are analyzed from fundamental physics and materials properties to a broad set of applications. The conference also covers the developments of perovskite optoelectronics, including light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.
The International Conference on Perovskite Thin Film Photovoltaics Perovskite Photonics and Optoelectronics (NIPHO) is the best place to hear the latest developments in perovskite solar cells as well as on recent advances in the fields of perovskite light-emitting diodes, lasers, optical devices, nanophotonics, nonlinear optical properties, colloidal nanostructures, photophysics and light-matter coupling.